<?php
/**
 * Junction_Sql_Expression_Traverser
 * 
 * Interface for tree traversers. 
 * 
 * @author Patrick J. Mizer <patrick.mizer@gmail.com>
 */
 
using("Junction_Sql_Expression_Node"); 
 
interface Junction_Sql_Expression_Traverser 
{
    /**
     * Traverses a tree in some manner.
     * 
     * @param Junction_Sql_Expression_Node
     */
    public function traverse(Junction_Sql_Expression_Node $root);
}
?>